@misc{indiciaeae8612b6294e,
  title = {Geologic map of the Craig quadrangle, Lewis and Clark and Cascade Counties, Montana},
  author = {Robert George Schmidt},
  year = {1977},
  doi = {10.3133/gq1411},
  url = {https://pubs.usgs.gov/publication/gq1411},
  note = {Source identifier: gq1411}
}